Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-14 | 145/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.13 (587.6) | 21.13 (536.8) | -2 (-50.8) -8.6% |
| Width inches (mm) | 5.71 (145) | 5.71 (145) | 0 (0) 0% |
| Circum. inches (mm) | 72.68 (1846) | 66.39 (1686.41) | -6.28 (-159.59) -8.6% |
| Sidewall Height inches (mm) | 4.57 (116) | 4.57 (116) | 0 (0) 0% |
| Revolutions per mile (km) | 871.8 (541.71) | 954.3 (592.98) | 82.5 (51.26) 9.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.27 mph (29.4 km/h) |
| 25 mph (40.23 km/h) | 22.84 mph (36.76 km/h) |
| 30 mph (48.28 km/h) | 27.41 mph (44.11 km/h) |
| 35 mph (56.33 km/h) | 31.97 mph (51.46 km/h) |
| 40 mph (64.37 km/h) | 36.54 mph (58.81 km/h) |
| 45 mph (72.42 km/h) | 41.11 mph (66.16 km/h) |
| 50 mph (80.47 km/h) | 45.68 mph (73.51 km/h) |
| 55 mph (88.51 km/h) | 50.25 mph (80.86 km/h) |
| 60 mph (96.56 km/h) | 54.81 mph (88.21 km/h) |
| 65 mph (104.61 km/h) | 59.38 mph (95.56 km/h) |
| 70 mph (112.65 km/h) | 63.95 mph (102.91 km/h) |
| 75 mph (120.7 km/h) | 68.52 mph (110.27 km/h) |
| 80 mph (128.75 km/h) | 73.08 mph (117.62 km/h) |
| 85 mph (136.79 km/h) | 77.65 mph (124.97 km/h) |
| 90 mph (144.84 km/h) | 82.22 mph (132.32 km/h) |
| 95 mph (152.89 km/h) | 86.79 mph (139.67 km/h) |
| 100 mph (160.93 km/h) | 91.35 mph (147.02 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
